As darkness falls and storms rage over Lake Geneva, a group of friends gather in a candle-lit villa. Among them is eighteen-year-old Mary, who has run away with her mercurial lover Percy Shelley. As laudanum stirs their feverish imaginations, their host Lord Byron challenges everyone to write a ghost story. Suddenly Mary is transported back to a long, strange summer in the wilds of Scotland, where she fell in love with the enigmatic Isabella Baxter, learned tales of mythical beasts and discovered that some monsters are real. Something fierce and terrifying has awoken in her. Now she will unleash it into the world.
